CA2456239C - Intermediates for preparing neuraminidase inhibitor conjugates - Google Patents
Intermediates for preparing neuraminidase inhibitor conjugates Download PDFInfo
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- CA2456239C CA2456239C CA2456239A CA2456239A CA2456239C CA 2456239 C CA2456239 C CA 2456239C CA 2456239 A CA2456239 A CA 2456239A CA 2456239 A CA2456239 A CA 2456239A CA 2456239 C CA2456239 C CA 2456239C
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- 239000002911 sialidase inhibitor Substances 0.000 title claims abstract description 16
- 229940123424 Neuraminidase inhibitor Drugs 0.000 title claims abstract description 13
- 239000000543 intermediate Substances 0.000 title description 15
- 150000001875 compounds Chemical class 0.000 claims abstract description 47
- 238000000034 method Methods 0.000 claims abstract description 20
- 238000002360 preparation method Methods 0.000 claims abstract description 12
- 125000006239 protecting group Chemical group 0.000 claims abstract description 9
- 150000000180 1,2-diols Chemical class 0.000 claims abstract description 5
- 125000006242 amine protecting group Chemical group 0.000 claims abstract description 4
- 125000006244 carboxylic acid protecting group Chemical group 0.000 claims abstract description 4
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical group C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 claims description 22
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 14
- 239000002904 solvent Substances 0.000 claims description 12
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 7
- PSHKMPUSSFXUIA-UHFFFAOYSA-N n,n-dimethylpyridin-2-amine Chemical group CN(C)C1=CC=CC=N1 PSHKMPUSSFXUIA-UHFFFAOYSA-N 0.000 claims description 7
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 claims description 6
- -1 t-butoxy carbonyl (Boc) group Chemical group 0.000 claims description 6
- GQHTUMJGOHRCHB-UHFFFAOYSA-N 2,3,4,6,7,8,9,10-octahydropyrimido[1,2-a]azepine Chemical compound C1CCCCN2CCCN=C21 GQHTUMJGOHRCHB-UHFFFAOYSA-N 0.000 claims description 4
- BTJIUGUIPKRLHP-UHFFFAOYSA-N 4-nitrophenol Chemical compound OC1=CC=C([N+]([O-])=O)C=C1 BTJIUGUIPKRLHP-UHFFFAOYSA-N 0.000 claims description 4
- CZZYITDELCSZES-UHFFFAOYSA-N diphenylmethane Chemical compound C=1C=CC=CC=1CC1=CC=CC=C1 CZZYITDELCSZES-UHFFFAOYSA-N 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 150000004820 halides Chemical class 0.000 claims description 3
- 150000003512 tertiary amines Chemical class 0.000 claims description 3
- 125000004169 (C1-C6) alkyl group Chemical group 0.000 claims description 2
- RGUKYNXWOWSRET-UHFFFAOYSA-N 4-pyrrolidin-1-ylpyridine Chemical compound C1CCCN1C1=CC=NC=C1 RGUKYNXWOWSRET-UHFFFAOYSA-N 0.000 claims description 2
- NQTADLQHYWFPDB-UHFFFAOYSA-N N-Hydroxysuccinimide Chemical compound ON1C(=O)CCC1=O NQTADLQHYWFPDB-UHFFFAOYSA-N 0.000 claims description 2
- 238000010511 deprotection reaction Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 24
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 14
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 12
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 12
- 238000004895 liquid chromatography mass spectrometry Methods 0.000 description 12
- 239000000203 mixture Substances 0.000 description 12
- 239000000243 solution Substances 0.000 description 10
- PFKFTWBEEFSNDU-UHFFFAOYSA-N carbonyldiimidazole Chemical compound C1=CN=CN1C(=O)N1C=CN=C1 PFKFTWBEEFSNDU-UHFFFAOYSA-N 0.000 description 9
- 229910052757 nitrogen Inorganic materials 0.000 description 8
- 125000005931 tert-butyloxycarbonyl group Chemical group [H]C([H])([H])C(OC(*)=O)(C([H])([H])[H])C([H])([H])[H] 0.000 description 8
- 239000007787 solid Substances 0.000 description 7
- VHYFNPMBLIVWCW-UHFFFAOYSA-N 4-Dimethylaminopyridine Chemical compound CN(C)C1=CC=NC=C1 VHYFNPMBLIVWCW-UHFFFAOYSA-N 0.000 description 6
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 6
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 6
- NXLNNXIXOYSCMB-UHFFFAOYSA-N (4-nitrophenyl) carbonochloridate Chemical compound [O-][N+](=O)C1=CC=C(OC(Cl)=O)C=C1 NXLNNXIXOYSCMB-UHFFFAOYSA-N 0.000 description 5
- 102100020870 La-related protein 6 Human genes 0.000 description 5
- 108050008265 La-related protein 6 Proteins 0.000 description 5
- 125000003118 aryl group Chemical group 0.000 description 5
- 239000006260 foam Substances 0.000 description 5
- 238000003786 synthesis reaction Methods 0.000 description 5
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 5
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- ZZVUWRFHKOJYTH-UHFFFAOYSA-N diphenhydramine Chemical group C=1C=CC=CC=1C(OCCN(C)C)C1=CC=CC=C1 ZZVUWRFHKOJYTH-UHFFFAOYSA-N 0.000 description 4
- 235000019439 ethyl acetate Nutrition 0.000 description 4
- 125000001841 imino group Chemical group [H]N=* 0.000 description 4
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 235000004694 Eucalyptus leucoxylon Nutrition 0.000 description 3
- 244000166102 Eucalyptus leucoxylon Species 0.000 description 3
- 102000005348 Neuraminidase Human genes 0.000 description 3
- 108010006232 Neuraminidase Proteins 0.000 description 3
- WTKZEGDFNFYCGP-UHFFFAOYSA-N Pyrazole Chemical compound C=1C=NNC=1 WTKZEGDFNFYCGP-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 229940042406 direct acting antivirals neuraminidase inhibitors Drugs 0.000 description 3
- 239000007858 starting material Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 2
- 101150041968 CDC13 gene Proteins 0.000 description 2
- NOTFZGFABLVTIG-UHFFFAOYSA-N Cyclohexylethyl acetate Chemical compound CC(=O)OCCC1CCCCC1 NOTFZGFABLVTIG-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- YGYAWVDWMABLBF-UHFFFAOYSA-N Phosgene Chemical compound ClC(Cl)=O YGYAWVDWMABLBF-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- HEDRZPFGACZZDS-MICDWDOJSA-N Trichloro(2H)methane Chemical compound [2H]C(Cl)(Cl)Cl HEDRZPFGACZZDS-MICDWDOJSA-N 0.000 description 2
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical compound ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000004587 chromatography analysis Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 235000019253 formic acid Nutrition 0.000 description 2
- 125000005647 linker group Chemical group 0.000 description 2
- OKXGHXHZNCJMSV-UHFFFAOYSA-N nitro phenyl carbonate Chemical compound [O-][N+](=O)OC(=O)OC1=CC=CC=C1 OKXGHXHZNCJMSV-UHFFFAOYSA-N 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- ARAIBEBZBOPLMB-UFGQHTETSA-N zanamivir Chemical class CC(=O)N[C@@H]1[C@@H](N=C(N)N)C=C(C(O)=O)O[C@H]1[C@H](O)[C@H](O)CO ARAIBEBZBOPLMB-UFGQHTETSA-N 0.000 description 2
- OWLYPTQJWZCYNG-MTBBMWQASA-N (2r,3r,4s)-3-acetamido-4-amino-2-[(1r,2r)-1,2,3-trihydroxypropyl]-3,4-dihydro-2h-pyran-6-carboxylic acid;trihydrate Chemical compound O.O.O.CC(=O)N[C@@H]1[C@@H](N)C=C(C(O)=O)O[C@H]1[C@H](O)[C@H](O)CO OWLYPTQJWZCYNG-MTBBMWQASA-N 0.000 description 1
- 125000005913 (C3-C6) cycloalkyl group Chemical group 0.000 description 1
- JCEZOHLWDIONSP-UHFFFAOYSA-N 3-[2-[2-(3-aminopropoxy)ethoxy]ethoxy]propan-1-amine Chemical compound NCCCOCCOCCOCCCN JCEZOHLWDIONSP-UHFFFAOYSA-N 0.000 description 1
- USFZMSVCRYTOJT-UHFFFAOYSA-N Ammonium acetate Chemical compound N.CC(O)=O USFZMSVCRYTOJT-UHFFFAOYSA-N 0.000 description 1
- 239000005695 Ammonium acetate Substances 0.000 description 1
- SHUCTULLHWLSNY-NTKYVHGQSA-N C(C)(=O)Cl.Cl.C(C)(=O)N[C@H]1[C@@H](OC(=C[C@@H]1N)C(=O)OC)[C@@H]([C@@H](CO)O)O Chemical compound C(C)(=O)Cl.Cl.C(C)(=O)N[C@H]1[C@@H](OC(=C[C@@H]1N)C(=O)OC)[C@@H]([C@@H](CO)O)O SHUCTULLHWLSNY-NTKYVHGQSA-N 0.000 description 1
- 101100446506 Mus musculus Fgf3 gene Proteins 0.000 description 1
- 101100348848 Mus musculus Notch4 gene Proteins 0.000 description 1
- 235000019502 Orange oil Nutrition 0.000 description 1
- 101000767160 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) Intracellular protein transport protein USO1 Proteins 0.000 description 1
- DHKHKXVYLBGOIT-UHFFFAOYSA-N acetaldehyde Diethyl Acetal Natural products CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 description 1
- 125000000738 acetamido group Chemical group [H]C([H])([H])C(=O)N([H])[*] 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 235000019257 ammonium acetate Nutrition 0.000 description 1
- 229940043376 ammonium acetate Drugs 0.000 description 1
- 230000000845 anti-microbial effect Effects 0.000 description 1
- 230000000840 anti-viral effect Effects 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 125000001246 bromo group Chemical group Br* 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 150000004657 carbamic acid derivatives Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- 229940125782 compound 2 Drugs 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 150000005676 cyclic carbonates Chemical class 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 1
- DEZRYPDIMOWBDS-UHFFFAOYSA-N dcm dichloromethane Chemical compound ClCCl.ClCCl DEZRYPDIMOWBDS-UHFFFAOYSA-N 0.000 description 1
- 239000000539 dimer Substances 0.000 description 1
- 125000006840 diphenylmethane group Chemical group 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 125000004185 ester group Chemical group 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000002038 ethyl acetate fraction Substances 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- OJCSPXHYDFONPU-UHFFFAOYSA-N etoac etoac Chemical compound CCOC(C)=O.CCOC(C)=O OJCSPXHYDFONPU-UHFFFAOYSA-N 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 125000001153 fluoro group Chemical group F* 0.000 description 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N glycerol group Chemical group OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 125000002346 iodo group Chemical group I* 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- BEFORDIRLSIKOF-IIHMKKKESA-N methyl (2r,3r,4s)-3-acetamido-4-[bis[(2-methylpropan-2-yl)oxycarbonylamino]methylideneamino]-2-[(s)-hydroxy-[(4r)-2-oxo-1,3-dioxolan-4-yl]methyl]-3,4-dihydro-2h-pyran-6-carboxylate Chemical compound O1C(C(=O)OC)=C[C@H](NC(NC(=O)OC(C)(C)C)=NC(=O)OC(C)(C)C)[C@@H](NC(C)=O)[C@@H]1[C@H](O)[C@@H]1OC(=O)OC1 BEFORDIRLSIKOF-IIHMKKKESA-N 0.000 description 1
- PEECTLLHENGOKU-UHFFFAOYSA-N n,n-dimethylpyridin-4-amine Chemical compound CN(C)C1=CC=NC=C1.CN(C)C1=CC=NC=C1 PEECTLLHENGOKU-UHFFFAOYSA-N 0.000 description 1
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 1
- 150000002828 nitro derivatives Chemical class 0.000 description 1
- 238000002414 normal-phase solid-phase extraction Methods 0.000 description 1
- 239000010502 orange oil Substances 0.000 description 1
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- WYURNTSHIVDZCO-UHFFFAOYSA-N tetrahydrofuran Substances C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 1
- WHRNULOCNSKMGB-UHFFFAOYSA-N tetrahydrofuran thf Chemical compound C1CCOC1.C1CCOC1 WHRNULOCNSKMGB-UHFFFAOYSA-N 0.000 description 1
- 238000001665 trituration Methods 0.000 description 1
- 241000712461 unidentified influenza virus Species 0.000 description 1
- 239000003039 volatile agent Substances 0.000 description 1
- 229960001028 zanamivir Drugs 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D407/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having oxygen atoms as the only ring hetero atoms, not provided for by group C07D405/00
- C07D407/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having oxygen atoms as the only ring hetero atoms, not provided for by group C07D405/00 containing two hetero rings
- C07D407/06—Heterocyclic compounds containing two or more hetero rings, at least one ring having oxygen atoms as the only ring hetero atoms, not provided for by group C07D405/00 containing two hetero rings linked by a carbon chain containing only aliphatic carbon atoms
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
- A61P31/12—Antivirals
- A61P31/14—Antivirals for RNA viruses
- A61P31/16—Antivirals for RNA viruses for influenza or rhinoviruses
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D309/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only ring hetero atom, not condensed with other rings
- C07D309/16—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only ring hetero atom, not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member
- C07D309/28—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only ring hetero atom, not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/55—Design of synthesis routes, e.g. reducing the use of auxiliary or protecting groups
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- Organic Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Virology (AREA)
- Oncology (AREA)
- Public Health (AREA)
- Molecular Biology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Medicinal Chemistry (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Pulmonology (AREA)
- Pharmacology & Pharmacy (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Communicable Diseases (AREA)
- Veterinary Medicine (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
- Medicines Containing Plant Substances (AREA)
- Plural Heterocyclic Compounds (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
- Saccharide Compounds (AREA)
- Pyrane Compounds (AREA)
Abstract
Compounds of formula (I), methods for their preparation and their use in the manufacture of neuraminidase inhibitor conjugates. Wherein R represents as carboxylic acid protecting group; P1 and P2 can be the same or different and are selected from amine protecting groups; P3 represents a protecting group for 1, 2 diols; and LG represents a leaving group.
Description
INTERMEDIATES FOR PREPARING NEURAMINIDASE INHIBITOR CONJUGATES
The present invention relates to novel compounds, methods for their preparation and their use in the manufacture of neuraminidase inhibitor conjugates.
Dimeric compounds and their use as neuraminidase inhibitors have been disclosed in W000/55149. Polymeric compounds and their use as neuraminidase inhibitors have been disclosed in W098/21243. In W000/55149, it was shown that when two neuraminidase-binding compounds are suitably linked together through a region of the molecule that is not involved in binding to the active site, the resultant dimers have enhanced anti-viral activity. Eur. J. Med. Chem 34 (1999) 563-574 discloses the synthesis and influenza virus sialidase inhibitory action of an analogue series of 4-guanidino-Neu5Ac2en (zanamivir) modified in the glycerol side chain.
In W000/55149, compound 7 is described as a useful precursor to certain dimeric neuraminidase inhibitors.
H2N(CH2)6NH20 HO
HO
AcHN =
NH
Compound (7) We have found that in a first aspect the invention provides compounds of formula (I):
~_LG
O O
H
O
OR
P3\
O
AcHN =
NH
P2NHLNP1 (I) wherein R represents a carboxylic acid protecting group;
The present invention relates to novel compounds, methods for their preparation and their use in the manufacture of neuraminidase inhibitor conjugates.
Dimeric compounds and their use as neuraminidase inhibitors have been disclosed in W000/55149. Polymeric compounds and their use as neuraminidase inhibitors have been disclosed in W098/21243. In W000/55149, it was shown that when two neuraminidase-binding compounds are suitably linked together through a region of the molecule that is not involved in binding to the active site, the resultant dimers have enhanced anti-viral activity. Eur. J. Med. Chem 34 (1999) 563-574 discloses the synthesis and influenza virus sialidase inhibitory action of an analogue series of 4-guanidino-Neu5Ac2en (zanamivir) modified in the glycerol side chain.
In W000/55149, compound 7 is described as a useful precursor to certain dimeric neuraminidase inhibitors.
H2N(CH2)6NH20 HO
HO
AcHN =
NH
Compound (7) We have found that in a first aspect the invention provides compounds of formula (I):
~_LG
O O
H
O
OR
P3\
O
AcHN =
NH
P2NHLNP1 (I) wherein R represents a carboxylic acid protecting group;
P1 and P2 can be the same or different and are selected from amine protecting groups;
P3 represents a protecting group for 1,2 diols; and LG represents a leaving group, for example, para-nitrophenol or a derivative thereof, halide, imidazole or N-hydroxysuccinimide.
Preferably R is C1_6 alkyl, diphenylmethane or an appropriate protecting group selected by one skilled in the art from common carboxylic acid protecting groups such as those listed in "Protective Groups in Organic Synthesis," TW Greene and PGM Wuts 1999 (3d edition), Wiley.
When used herein a C1_6 alkyl group can be straight, or branched, for example methyl, ethyl, propyl, isopropyl, butyl, t-butyl, pentyl, or hexyl, preferably methyl or t-butyl. An alkyl group may also be cyclic, that is a C3-6 cycloalkyl group, for example cyclohexyl.
Common amine protecting groups are as those listed in "Protective Groups in Organic Synthesis,"
TW Greene and PGM Wuts 1999 (3d edition), Wiley, preferably a t-butoxycarbonyl (Boc) group.
Protecting groups for 1,2 diols are CO (a cyclic carbonate) or CHMe (a methyl acetal) or an appropriate protecting group selected by one skilled in the art from common 1,2 diol protecting groups such as those listed in "Protective Groups in Organic Synthesis," TW
Greene and PGM
Wuts 1999 (3d edition), Wiley. Preferably P3 represents CO or CHMe.
Other leaving groups will be known to the person skilled in the art for the preparation of carbamates.
Even more preferably R is methyl or diphenylmethane, P1 and P2 are Boc, P3 is CO and LG is para-nitrophenol.
Compounds of the present invention offer a significant advantage in the rapid preparation of large numbers of neuraminidase inhibitor conjugates, specifically those disclosed in WO 00/55149.
Compounds of the present invention provide a common intermediate from which a large number of neuraminidase inhibitor conjugates can be prepared using different "linking groups" many of which are commercially available. Using a common intermediate allows flexibility and the ability to produce large numbers of compound quickly.
Compounds of formula (I) may be useful in the preparation of compound libraries comprising at - 2a-least 2, e.g. 5 to 1000, compounds, preferably 10 to 100 compounds. Compound libraries maybe prepared by "split and mix" approach or by multiple parallel synthesis using either solution phase or solid phase chemistry, by process known in the art.
P3 represents a protecting group for 1,2 diols; and LG represents a leaving group, for example, para-nitrophenol or a derivative thereof, halide, imidazole or N-hydroxysuccinimide.
Preferably R is C1_6 alkyl, diphenylmethane or an appropriate protecting group selected by one skilled in the art from common carboxylic acid protecting groups such as those listed in "Protective Groups in Organic Synthesis," TW Greene and PGM Wuts 1999 (3d edition), Wiley.
When used herein a C1_6 alkyl group can be straight, or branched, for example methyl, ethyl, propyl, isopropyl, butyl, t-butyl, pentyl, or hexyl, preferably methyl or t-butyl. An alkyl group may also be cyclic, that is a C3-6 cycloalkyl group, for example cyclohexyl.
Common amine protecting groups are as those listed in "Protective Groups in Organic Synthesis,"
TW Greene and PGM Wuts 1999 (3d edition), Wiley, preferably a t-butoxycarbonyl (Boc) group.
Protecting groups for 1,2 diols are CO (a cyclic carbonate) or CHMe (a methyl acetal) or an appropriate protecting group selected by one skilled in the art from common 1,2 diol protecting groups such as those listed in "Protective Groups in Organic Synthesis," TW
Greene and PGM
Wuts 1999 (3d edition), Wiley. Preferably P3 represents CO or CHMe.
Other leaving groups will be known to the person skilled in the art for the preparation of carbamates.
Even more preferably R is methyl or diphenylmethane, P1 and P2 are Boc, P3 is CO and LG is para-nitrophenol.
Compounds of the present invention offer a significant advantage in the rapid preparation of large numbers of neuraminidase inhibitor conjugates, specifically those disclosed in WO 00/55149.
Compounds of the present invention provide a common intermediate from which a large number of neuraminidase inhibitor conjugates can be prepared using different "linking groups" many of which are commercially available. Using a common intermediate allows flexibility and the ability to produce large numbers of compound quickly.
Compounds of formula (I) may be useful in the preparation of compound libraries comprising at - 2a-least 2, e.g. 5 to 1000, compounds, preferably 10 to 100 compounds. Compound libraries maybe prepared by "split and mix" approach or by multiple parallel synthesis using either solution phase or solid phase chemistry, by process known in the art.
A second aspect of the invention is the use of compounds of formula (I) in the preparation of neuraminidase inhibitor conjugates, specifically those disclosed in WO
00/55149.
A third aspect of the invention is the process for the preparation of neuraminidase inhibitor conjugates, specifically those disclosed WO/00155149 comprising the use of compounds of formula (I).
A further aspect of the invention is neuraminidase inhibitor conjugates, specifically those disclosed in W000/55149, prepared using compounds of formula (I).
W000/55149 and W098/21243 teaches the generic formula of the neuraminidase inhibitor conjugates.
Compounds of formula (I) can be prepared by reaction of compounds of formula (III):
O
OR
3\ O
AcHN (III) NH
P=HN PI
wherein PI, P2, P3 and R are as described for compounds of formula (I), with compounds of formula (II):
La (n) wherein each LG is independently as described for compounds of formula (I), in a solvent, and a base.
Preferably the base used is a tertiary amine, for example dimethylaminopyridine (DMAP), 4-pyrrolidinopyri dine or 1,8-diazabicyclo[5.4.0]undec-7-ene, more preferably DMAP.
Preferably at least two equivalents of base to compound of formula (III) are used.
00/55149.
A third aspect of the invention is the process for the preparation of neuraminidase inhibitor conjugates, specifically those disclosed WO/00155149 comprising the use of compounds of formula (I).
A further aspect of the invention is neuraminidase inhibitor conjugates, specifically those disclosed in W000/55149, prepared using compounds of formula (I).
W000/55149 and W098/21243 teaches the generic formula of the neuraminidase inhibitor conjugates.
Compounds of formula (I) can be prepared by reaction of compounds of formula (III):
O
OR
3\ O
AcHN (III) NH
P=HN PI
wherein PI, P2, P3 and R are as described for compounds of formula (I), with compounds of formula (II):
La (n) wherein each LG is independently as described for compounds of formula (I), in a solvent, and a base.
Preferably the base used is a tertiary amine, for example dimethylaminopyridine (DMAP), 4-pyrrolidinopyri dine or 1,8-diazabicyclo[5.4.0]undec-7-ene, more preferably DMAP.
Preferably at least two equivalents of base to compound of formula (III) are used.
Preferably the solvent is pyridine or a pyridine type solvent.
Preferably the reaction should be carried out in the absence of water, for example by azetroping the starting materials, or drying in an oven prior to carrying out the reaction.
For example compounds of formula (II) may be symmetrical or unsymmetrical e.g.
p-nitrophenylchloroformate.
Compounds of formula (III) can be prepared by reaction of compounds of formula (IV);
H
HO O
OR
HO
AcHN =
NH
(IV) wherein P1, P2 and R are as described for compounds of formula (I), with carbonyldiimidazole (CDI) or phosgene or other phosgene equivalents.
Compounds of formula (IV) wherein R is diphenylmethane are known in the literature, J
Med Chem 1998, 41, 787-797.
Neuraminidase inhibitor conjugates of formula (V);
O Linker N O --f H O O
O
O
H O
0 0 MeO O
OMe 0 0 NHAc AcHN NH
NH (V) HN NH
may be prepared by reacting compounds of formula (I) with compounds of formula (VI);
H2N-_ Linker NH2 NO
-in solvent, for example pyridine, and in the presence of base, for example DMAP, followed if necessary by deprotection.
Preferably the reaction should be carried out in the absence of water, for example by azetroping the starting materials, or drying in an oven prior to carrying out the reaction.
For example compounds of formula (II) may be symmetrical or unsymmetrical e.g.
p-nitrophenylchloroformate.
Compounds of formula (III) can be prepared by reaction of compounds of formula (IV);
H
HO O
OR
HO
AcHN =
NH
(IV) wherein P1, P2 and R are as described for compounds of formula (I), with carbonyldiimidazole (CDI) or phosgene or other phosgene equivalents.
Compounds of formula (IV) wherein R is diphenylmethane are known in the literature, J
Med Chem 1998, 41, 787-797.
Neuraminidase inhibitor conjugates of formula (V);
O Linker N O --f H O O
O
O
H O
0 0 MeO O
OMe 0 0 NHAc AcHN NH
NH (V) HN NH
may be prepared by reacting compounds of formula (I) with compounds of formula (VI);
H2N-_ Linker NH2 NO
-in solvent, for example pyridine, and in the presence of base, for example DMAP, followed if necessary by deprotection.
5 Methods of deprotecting the amine and ester groups will be well known to the person skilled in the art.
When used herein halide represents a fluoro, chloro, bromo or iodo group.
Compounds of formula (V) can be tested for neuraminidase activity by methods known in the art for example by plaque assays, Hayden et al. (Antimicrobial. Agents Chemother., 1980, 17, 865).
The invention will now be described in detail by way of reference to the following non-limiting examples.
Examples 1 and 2 disclose the preparation of compounds of formula (I). Example describes the preparation of a neuraminidase inhibitor conjugate of formula (V).
Abbreviations used herein are DPM -diphenylmethane SPE - solid phase extraction.
DMAP - 4-dimethylaminopyridine BOC - t-butoxycarbonyl EtOAc - ethyl acetate DCM - dichloromethane THF- tetrahydrofuran CDI- 1,1'-carbonyldiimidazole LC/MS liquid chromatography mass spectrometry.
Example 1.
Intermediate 1 Benzhydryl (2R,3R,4S)-3-(acetylamino)-4-(J [(tert-butoxycarbonyl)amino] [(tert-butoxycarbonyl)imino]methyl } amino)-2- (S)-hydroxy [(4R)-2-oxo-1,3-dioxolan-4-yl] methyl } -3,4-dihydro-2H-pyran-6-carboxylate OH OH OH
OH MeCN
HN = HN
0 HN,NHBOC CDI 0 0 HNY NHBOC
NBOC Int 1 NBOC
C35H46N4011 = 698 C,H44N4O12 = 724 Benzhydryl (2R,3R,4S)-3-(acetylamino)-4-Q (E)-[(tert-butoxycarbonyl)amino]
[(tert-butoxycarbonyl)imino]methyl } amino)-2-[(1R,2R)-1,2,3-trihydroxypropyl]-3,4-dihydro-2H-pyran-6-carboxylate (see J. Med. Chem. 1998, 41, 787-797) (12.38g;
17.7mmoles) was dissolved in dry acetonitrile (130ml) under nitrogen at room temperature.
The solution was stirred and 1,1'-carbonyldiimidazole (2.87g; 17.7mmoles) was added. After 16 hours LC/MS showed the presence of starting triol so further 1,1'-carbonyldiimidazole (total of 0.493g; 3mmoles) was added. After a few hours LC/MS showed no triol present.
The solvent was evaporated and the residue flash columned on silica, eluting with 1:1 ethyl acetate/40-60 petroleum ether. Fractions containing wanted product were evaporated then taken up in dichloromethane, dried with sodium sulphate, filtered and evaporated to give Intermediate 1 as an off white solid (11.05g; 86%).
LC/MS (Blue method) MH+ = 725, Tet = 4.09 minutes.
Example 1 Benzhydryl (2R,3R,4S)-3-(acetylamino)-4-({ (E)-[(tert-butoxycarbonyl)amino] [(tert-butoxycarbonyl)imino]methyl } amino)-2- { (S)- {
[(4-nitrophenoxy)carbonyl]oxy } [(4R)-2-oxo-1,3-dioxolan-4-yl]methyl } -3,4-dihydro-2H-pyran-6-carboxylate O
~~HN
HN~N~O
O
O"N O`
A solution of benzhydryl (2R,3R,4S)-3-(acetylamino)-4-({ [(tert-butoxycarbonyl)amino][(tert-butoxycarbonyl)imino]methyl } amino)-2- { (S)-hydroxy[(4R)-2-oxo-1,3-dioxolan-4-yl]methyl }-3,4-dihydro-2H-pyran-6-carboxylate (Intermediate 1)(143mg, 0.197mmol) in dry pyridine (3m1) containing 4-dimethylaminopyridine (120mg, 0.982mmo1) was treated with 4-nitrophenylchloroformate (199mg, 0.987mmol) at 22 C. The mixture was stirred at 22 C. For 17h, then the pyridine removed in vacuo. The residue was purified by SPE
chromatography (5g cartridge) eluting with cyclohexane - ethyl acetate (4:1 - 2:1) to afford Example 1 as a pale yellow gum (99mg, 56%).
NMR 8(CDC13) 11.30 (lHbrd, NH), 8.62 (l H brd, NH), 8.23 (2H, AA' BB', aromatic CH's), 7.52 (2H, AA'BB', aromatic CH's), 7.43-7.30 (10Hm, aromatic CH's), 6.95(lHs, CH), 6.76 (111 brd, NH), 6.05 (lHd, =CH), 5.56 (lHdd, CH), 5.22 (lHdt, CH), 5.00 (lHdt, CH), 4.72 (lHdd, CH), 4.59 (lHdd, CH), 4.48 (lHq, CH), 4.25 (lHdd, CH), 1.92 (3Hs, CH3), 1.48 (9Hs, tert butyl), and 1.43 (9Hs, tert butyl).
LCIMS Rt = 4.19min. (MH = 890, MH" = 888) Example 2-OH OH OH OH
H O I C02H HCI/MeOH H O C02Me OH OH
HN
0-J\ NH2 Int 2 O-J\ NH2 .HCI
C,,H18N207 =290 C72H2ON201=304 N NBOC
NHBOC
THF/MeOH/Et3N
OH OH OH
H O C02Me ::N HN =
0 HNrNHBOC 0-_~\ HNYNHBOC
Into NBOC Int 3 NBOC
C24H36N4O12=572 C23H38N401,=546 Intermediate 2 Methyl (2R,3R,4S)-3-(acetylamino)-4-amino-2-[(1R,2R)-1,2,3-trihydroxypropyl]-3,4-dihydro-2H-pyran-6-carboxylate hydrochloride Acetyl chloride (75m1; 1.05mole) was added drop-wise with stirring to methanol (7500m1) at 0-5 C under nitrogen. The mixture was stirred at this temperature for a further 15 minutes then held at approximately 10 C as (2R,3R,4S)-3-(acetylamino)-4-amino-2-[(1R,2R)-1,2,3-trihydroxypropyl]-3,4-dihydro-2H-pyran-6-carboxylic acid trihydrate (see J. Med. Chem. 1998, 41, 787-797) (250g; 726mmoles) was added in portions. The mixture was stirred at approximately 60 C for 5 hours then cooled to approximately 20 C and stirred at this temperature overnight. The solvent was removed and the residue twice evaporated down again with methanol (2x500m1) to give a mixture of a foam and gum. This was re-dissolved in methanol (-1000m1), evaporated and the residue then triturated with DCM and re-evaporated. The trituration DCM
process was repeated. The residue was dried overnight in a vacuum-oven at approximately 30 C, crushed and then dried overnight again to give Intermediate 2 as a white powder (264.2g).
When used herein halide represents a fluoro, chloro, bromo or iodo group.
Compounds of formula (V) can be tested for neuraminidase activity by methods known in the art for example by plaque assays, Hayden et al. (Antimicrobial. Agents Chemother., 1980, 17, 865).
The invention will now be described in detail by way of reference to the following non-limiting examples.
Examples 1 and 2 disclose the preparation of compounds of formula (I). Example describes the preparation of a neuraminidase inhibitor conjugate of formula (V).
Abbreviations used herein are DPM -diphenylmethane SPE - solid phase extraction.
DMAP - 4-dimethylaminopyridine BOC - t-butoxycarbonyl EtOAc - ethyl acetate DCM - dichloromethane THF- tetrahydrofuran CDI- 1,1'-carbonyldiimidazole LC/MS liquid chromatography mass spectrometry.
Example 1.
Intermediate 1 Benzhydryl (2R,3R,4S)-3-(acetylamino)-4-(J [(tert-butoxycarbonyl)amino] [(tert-butoxycarbonyl)imino]methyl } amino)-2- (S)-hydroxy [(4R)-2-oxo-1,3-dioxolan-4-yl] methyl } -3,4-dihydro-2H-pyran-6-carboxylate OH OH OH
OH MeCN
HN = HN
0 HN,NHBOC CDI 0 0 HNY NHBOC
NBOC Int 1 NBOC
C35H46N4011 = 698 C,H44N4O12 = 724 Benzhydryl (2R,3R,4S)-3-(acetylamino)-4-Q (E)-[(tert-butoxycarbonyl)amino]
[(tert-butoxycarbonyl)imino]methyl } amino)-2-[(1R,2R)-1,2,3-trihydroxypropyl]-3,4-dihydro-2H-pyran-6-carboxylate (see J. Med. Chem. 1998, 41, 787-797) (12.38g;
17.7mmoles) was dissolved in dry acetonitrile (130ml) under nitrogen at room temperature.
The solution was stirred and 1,1'-carbonyldiimidazole (2.87g; 17.7mmoles) was added. After 16 hours LC/MS showed the presence of starting triol so further 1,1'-carbonyldiimidazole (total of 0.493g; 3mmoles) was added. After a few hours LC/MS showed no triol present.
The solvent was evaporated and the residue flash columned on silica, eluting with 1:1 ethyl acetate/40-60 petroleum ether. Fractions containing wanted product were evaporated then taken up in dichloromethane, dried with sodium sulphate, filtered and evaporated to give Intermediate 1 as an off white solid (11.05g; 86%).
LC/MS (Blue method) MH+ = 725, Tet = 4.09 minutes.
Example 1 Benzhydryl (2R,3R,4S)-3-(acetylamino)-4-({ (E)-[(tert-butoxycarbonyl)amino] [(tert-butoxycarbonyl)imino]methyl } amino)-2- { (S)- {
[(4-nitrophenoxy)carbonyl]oxy } [(4R)-2-oxo-1,3-dioxolan-4-yl]methyl } -3,4-dihydro-2H-pyran-6-carboxylate O
~~HN
HN~N~O
O
O"N O`
A solution of benzhydryl (2R,3R,4S)-3-(acetylamino)-4-({ [(tert-butoxycarbonyl)amino][(tert-butoxycarbonyl)imino]methyl } amino)-2- { (S)-hydroxy[(4R)-2-oxo-1,3-dioxolan-4-yl]methyl }-3,4-dihydro-2H-pyran-6-carboxylate (Intermediate 1)(143mg, 0.197mmol) in dry pyridine (3m1) containing 4-dimethylaminopyridine (120mg, 0.982mmo1) was treated with 4-nitrophenylchloroformate (199mg, 0.987mmol) at 22 C. The mixture was stirred at 22 C. For 17h, then the pyridine removed in vacuo. The residue was purified by SPE
chromatography (5g cartridge) eluting with cyclohexane - ethyl acetate (4:1 - 2:1) to afford Example 1 as a pale yellow gum (99mg, 56%).
NMR 8(CDC13) 11.30 (lHbrd, NH), 8.62 (l H brd, NH), 8.23 (2H, AA' BB', aromatic CH's), 7.52 (2H, AA'BB', aromatic CH's), 7.43-7.30 (10Hm, aromatic CH's), 6.95(lHs, CH), 6.76 (111 brd, NH), 6.05 (lHd, =CH), 5.56 (lHdd, CH), 5.22 (lHdt, CH), 5.00 (lHdt, CH), 4.72 (lHdd, CH), 4.59 (lHdd, CH), 4.48 (lHq, CH), 4.25 (lHdd, CH), 1.92 (3Hs, CH3), 1.48 (9Hs, tert butyl), and 1.43 (9Hs, tert butyl).
LCIMS Rt = 4.19min. (MH = 890, MH" = 888) Example 2-OH OH OH OH
H O I C02H HCI/MeOH H O C02Me OH OH
HN
0-J\ NH2 Int 2 O-J\ NH2 .HCI
C,,H18N207 =290 C72H2ON201=304 N NBOC
NHBOC
THF/MeOH/Et3N
OH OH OH
H O C02Me ::N HN =
0 HNrNHBOC 0-_~\ HNYNHBOC
Into NBOC Int 3 NBOC
C24H36N4O12=572 C23H38N401,=546 Intermediate 2 Methyl (2R,3R,4S)-3-(acetylamino)-4-amino-2-[(1R,2R)-1,2,3-trihydroxypropyl]-3,4-dihydro-2H-pyran-6-carboxylate hydrochloride Acetyl chloride (75m1; 1.05mole) was added drop-wise with stirring to methanol (7500m1) at 0-5 C under nitrogen. The mixture was stirred at this temperature for a further 15 minutes then held at approximately 10 C as (2R,3R,4S)-3-(acetylamino)-4-amino-2-[(1R,2R)-1,2,3-trihydroxypropyl]-3,4-dihydro-2H-pyran-6-carboxylic acid trihydrate (see J. Med. Chem. 1998, 41, 787-797) (250g; 726mmoles) was added in portions. The mixture was stirred at approximately 60 C for 5 hours then cooled to approximately 20 C and stirred at this temperature overnight. The solvent was removed and the residue twice evaporated down again with methanol (2x500m1) to give a mixture of a foam and gum. This was re-dissolved in methanol (-1000m1), evaporated and the residue then triturated with DCM and re-evaporated. The trituration DCM
process was repeated. The residue was dried overnight in a vacuum-oven at approximately 30 C, crushed and then dried overnight again to give Intermediate 2 as a white powder (264.2g).
LC/MS (Orange Method) MH+ = 305, Tret = 0.54 minutes.
Intermediate 3 Methyl (2R,3R,4S)-3-(acetylamino)-4-Q [(tert-butoxycarbonyl)amino][(tert-butoxycarbonyl)imino]methyl}amino)-2-[(1R,2R)-1,2,3-trihydroxypropyl]-3,4-dihydro-2H-pyran-6-carboxylate The amino ester hydrochloride Intermediate 2 (211.6g; 0.62mole) was added portion-wise to methanol (2100m1) stirring under nitrogen in a 10 litre reactor to give a pale brown solution. THE (2100m1) was added. Triethylamine (86.5m1; 0.62mole) was added drop-wise with stirring and then a solution of N,N'-bis-t-butyloxycarbonyl-l-guanylpyrazole (201.3g; 0.649mmole) in THE (2100m1) was added drop-wise, fairly quickly, maintaining the reaction temperature at approximately 22 C. The mixture was stirred under nitrogen at approximately 22 C for 45 hours then filtered to remove a small amount of solid and the filtrate evaporated to dryness. After standing overnight the gummy yellow residue was triturated with ethyl acetate (2500m1) by rotation on rotary evaporator to give a fine white solid which was filtered off. The filtrate was evaporated down and dried under high vacuum to give a foam (-333g). The foam was dissolved in 3% methanol/DCM
(-700m1) and purified on a 2.5kg Biotage column pre-conditioned in and eluted with 3%
methanol/DCM. The purest fractions were combined and evaporated then dried at approximately 30 C to give Intermediate 3 as a white solid (192.8g; 49.4%
yield corrected for the presence of pyrazole). NMR showed the presence of -54mole %
pyrazole (-13% by weight).
LC/MS (Orange Method) MH+ = 547, Tre1= 5.07 minutes.
Intermediate 4 methyl (2R,3R,4S)-3-(acetylamino)-4-({ [(tert-butoxycarbonyl)amino] [(tert-butoxycarbonyl)imino]methyl } amino)-2- { (S)-hydroxy[(4R)-2-oxo-1,3-dioxolan-4-yl]methyl } -3,4-dihydro-2H-pyran-6-carboxylate Intermediate 3 (423.2g; ca 0.77mole) (contaminated with -13% pyrazole), was dissolved in dry acetonitrile (4750m1) and stirred under nitrogen in a 10 litre reactor.
CDI (135.6g;
0.84mole) was added portion-wise using circulator to control the slight exotherm and maintain the reaction temperature at approximately 22 C. The mixture was stirred at this temperature under nitrogen overnight. After 22 hours the solvent was removed and the residual yellow gum was dissolved in ethyl acetate (3500ml) and returned to the reactor.
The solution was washed in the reactor twice with dilute hydrochloric acid (2x1250m1;
1M), then once with water (1000ml), then once with brine (800m1). The solution was dried over magnesium sulphate, filtered, evaporated and dried in high vacuum to give a white foam (378g). The foam was dissolved in DCM (--1000ml) and the solution applied in two batches to a 2.5kg Biotage column preconditioned in and eluted with 1:1 hexane/ethyl acetate to give, after evaporation and drying, Intermediate 4 as a white solid (total 292.1g; -76% based on corrected amount of starting material).
LCIMS (Orange Method) MH+ = 573, Tret = 5.85 minutes.
Intermediate 3 Methyl (2R,3R,4S)-3-(acetylamino)-4-Q [(tert-butoxycarbonyl)amino][(tert-butoxycarbonyl)imino]methyl}amino)-2-[(1R,2R)-1,2,3-trihydroxypropyl]-3,4-dihydro-2H-pyran-6-carboxylate The amino ester hydrochloride Intermediate 2 (211.6g; 0.62mole) was added portion-wise to methanol (2100m1) stirring under nitrogen in a 10 litre reactor to give a pale brown solution. THE (2100m1) was added. Triethylamine (86.5m1; 0.62mole) was added drop-wise with stirring and then a solution of N,N'-bis-t-butyloxycarbonyl-l-guanylpyrazole (201.3g; 0.649mmole) in THE (2100m1) was added drop-wise, fairly quickly, maintaining the reaction temperature at approximately 22 C. The mixture was stirred under nitrogen at approximately 22 C for 45 hours then filtered to remove a small amount of solid and the filtrate evaporated to dryness. After standing overnight the gummy yellow residue was triturated with ethyl acetate (2500m1) by rotation on rotary evaporator to give a fine white solid which was filtered off. The filtrate was evaporated down and dried under high vacuum to give a foam (-333g). The foam was dissolved in 3% methanol/DCM
(-700m1) and purified on a 2.5kg Biotage column pre-conditioned in and eluted with 3%
methanol/DCM. The purest fractions were combined and evaporated then dried at approximately 30 C to give Intermediate 3 as a white solid (192.8g; 49.4%
yield corrected for the presence of pyrazole). NMR showed the presence of -54mole %
pyrazole (-13% by weight).
LC/MS (Orange Method) MH+ = 547, Tre1= 5.07 minutes.
Intermediate 4 methyl (2R,3R,4S)-3-(acetylamino)-4-({ [(tert-butoxycarbonyl)amino] [(tert-butoxycarbonyl)imino]methyl } amino)-2- { (S)-hydroxy[(4R)-2-oxo-1,3-dioxolan-4-yl]methyl } -3,4-dihydro-2H-pyran-6-carboxylate Intermediate 3 (423.2g; ca 0.77mole) (contaminated with -13% pyrazole), was dissolved in dry acetonitrile (4750m1) and stirred under nitrogen in a 10 litre reactor.
CDI (135.6g;
0.84mole) was added portion-wise using circulator to control the slight exotherm and maintain the reaction temperature at approximately 22 C. The mixture was stirred at this temperature under nitrogen overnight. After 22 hours the solvent was removed and the residual yellow gum was dissolved in ethyl acetate (3500ml) and returned to the reactor.
The solution was washed in the reactor twice with dilute hydrochloric acid (2x1250m1;
1M), then once with water (1000ml), then once with brine (800m1). The solution was dried over magnesium sulphate, filtered, evaporated and dried in high vacuum to give a white foam (378g). The foam was dissolved in DCM (--1000ml) and the solution applied in two batches to a 2.5kg Biotage column preconditioned in and eluted with 1:1 hexane/ethyl acetate to give, after evaporation and drying, Intermediate 4 as a white solid (total 292.1g; -76% based on corrected amount of starting material).
LCIMS (Orange Method) MH+ = 573, Tret = 5.85 minutes.
Example 2- Methyl (2R,3R,4S)-3-(acetylamino)-4-({(E)-[(tert-butoxycarbonyl)amino] [(tert-butoxycarbonyl)imino]methyl }amino)-2- { (S)-{
[(4-nitrophenoxy)carbonyl]oxy } [(4R)-2-oxo-1,3-dioxolan-4-yl]methyl } -3,4-dihydro-2H-pyran-6-carboxylate O
O---~
H
O
O=-O HN
HN~Ny0 O 111, 0 Y N 0`
A solution of methyl (2R,3R,4S)-3-(acetylamino)-4-({[(tert-butoxycarbonyl)amino][(tert-butoxycarbonyl)imino]methyl } amino)-2- { (S)-hydroxy[(4R)-2-oxo-1,3-dioxolan-4-yl]methyl } -3,4-dihydro-2H-pyran-6-carboxylate (113mg, 0.197mmol) in dry pyridine (3m1) containing 4-dimethylaminopyridine (120mg, 0.982mmo1) was treated with 4-nitrophenylchloroformate (199mg, 0.987mmo1) at 22 C. The mixture was stirred at 22 C. For 17h, then the pyridine removed in vacuo. The residue was purified by SPE chromatography (5g cartridge) eluting with cyclohexane - ethyl acetate (4:1 - 2:1) to afford Example 2 as a pale yellow gum (96mg, 66%).
NMR S(CDC13) 11.3 (1Hs, NH), 8.58 (1H brd, NH), 8.26 (2H, AA'BB', aromatic CH's), 7.56 (2H, AA'BB', aromatic CH's), 6.82 (1H brd, NH), 5.93 (lHd, =CH), 5.54 (1Hdd, CH), 5.20 (1 Hdt, CH), 5.10 (1 Hdt, CH), 4.78 (2Hm, 2xCH), 4.44 (l H brq, CH), 4.28 (1 Hdd, CH), 3.82 (3Hs CH3), 1.91 (3Hs, CH3), and 1.48 (18Hs, 2x tert butyl).
LCMS R, = 3.87min. (MH+ = 738, MHf = 736) Example 3 OH OyO & NO2 H O COZDPM
4-NO2 PhOCOCI 0 o o H O C02DPM
II
0 HN HN NHBOC pyridine/DMAP 10 Oo 0 u u HN
II
NBOC
C36H44N4012 = 724 C43H47N5016 = 889 H2N__~O-'-I-O---_-O-__-I-_\NH2 O)LN~~\O~/O~\O~\N)LO
H
OH C02DPM H O ( COZDPM
OYO OYO
HN HN
O 0 HNyNHBOC 0 O J HNYNHBOC
NBOC J~ NBOC
C84H103N10 29 = 1720 The benzhydryl (2R,3R,4S)-3-(acetylamino)-4-Q [(tert-butoxycarbonyl)amino]
[(tert-butoxycarbonyl)imino]methyl } amino)-2- { (S)-hydroxy[(4R)-2-oxo-1,3-dioxolan-yl]methyl}-3,4-dihydro-2H-pyran-6-carboxylate (0.4g;0.55mmole) was azeotroped times from dry toluene and the dried solid was dissolved in molecular sieve-dried pyridine (1.6m1). The solution was treated with 4-dimethylaminopyridine (0.17g;1.4mmoles). To this was added 4-nitrophenylchloroformate (0.12g;0.6mmole) under nitrogen. A slight exotherm occurred, the temperature rising from 24 C
to 27 C.
The mixture was stirred at room temperature for 3 hours after which time LC/MS
showed the absence of starting material and the presence of the nitrophenylcarbonate (Example 1) MH+ = 890.
To this mixture was added 4,7, 1 0-trioxa- 1, 13-tridecanediamine (60.7mg;
0.276mmole) in dry pyridine (1 ml). The resulting mixture was stirred at room temperature for 3 hours after which time LCMS showed the absence of the nitro compound 2 and the presence of product 3 at (M + 2H+)/2 = 861. Volatiles were removed in vacuo at 40 C and the resulting orange oil was applied to a lOg Si SPE cartridge eluted with DCM(5x), ether(5x) and EtOAc(5x). The product eluted in the EtOAc fractions as a white solid (0.2g; 22%).
The product may be deprotected using standard techniques.
N.B. The 4-nitrophenylchloroformate should be white with no trace of yellow colour.
LC/MS Details - Blue Method Micromass Platform II mass spectrometer operating in positive ion electrospray mode, mass range 100-1000 amu.
Column : 3.3cm x 4.6mm ID, 3 m ABZ+PLUS
Flow Rate : 3m1/min Injection Volume : 5p.1 Solvent A : 95% acetonitrile + 0.05% formic acid Solvent B : 0.1 % formic acid + 1OmMolar ammonium acetate Gradient : 0% A/0.7min, 0-100% A/3.5min, 100% A/l.lmin, 100-0% A/0.2min LC/MS Details - Orange Method Instrument: Micromass Platform II
Ionisation Mode: Electrospray +ve Range: 100-1000amu Column: 50mm x 2.1mm Phenomenex Luna C18, 5um.
Flow:1.0ml/min Inj Vol: 5u1 Diode Array Detector: 220-300nm Mobile Phase: A - Water + 0.05% v/v TFA.
B - Acetonitrile + 0.05% v/v TFA
Gradient: Time %A %B
8.1 100 0 It is to be understood that the present invention covers all combinations of particular and preferred subgroups described hereinabove.
Throughout the specification and the claims which follow, unless the context requires otherwise, the word `comprise', and variations such as `comprises' and `comprising', will be understood to imply the inclusion of a stated integer or step or group of integers but not to the exclusion of any other integer or step or group of integers or steps.
The application of which this description and claims forms part may be used as a basis for priority in respect of any subsequent application. The claims of such subsequent application may be directed to any feature or combination of features described herein.
They may take the form of composition, process, or use claims and may include by way of example and without limitation the following claims.
[(4-nitrophenoxy)carbonyl]oxy } [(4R)-2-oxo-1,3-dioxolan-4-yl]methyl } -3,4-dihydro-2H-pyran-6-carboxylate O
O---~
H
O
O=-O HN
HN~Ny0 O 111, 0 Y N 0`
A solution of methyl (2R,3R,4S)-3-(acetylamino)-4-({[(tert-butoxycarbonyl)amino][(tert-butoxycarbonyl)imino]methyl } amino)-2- { (S)-hydroxy[(4R)-2-oxo-1,3-dioxolan-4-yl]methyl } -3,4-dihydro-2H-pyran-6-carboxylate (113mg, 0.197mmol) in dry pyridine (3m1) containing 4-dimethylaminopyridine (120mg, 0.982mmo1) was treated with 4-nitrophenylchloroformate (199mg, 0.987mmo1) at 22 C. The mixture was stirred at 22 C. For 17h, then the pyridine removed in vacuo. The residue was purified by SPE chromatography (5g cartridge) eluting with cyclohexane - ethyl acetate (4:1 - 2:1) to afford Example 2 as a pale yellow gum (96mg, 66%).
NMR S(CDC13) 11.3 (1Hs, NH), 8.58 (1H brd, NH), 8.26 (2H, AA'BB', aromatic CH's), 7.56 (2H, AA'BB', aromatic CH's), 6.82 (1H brd, NH), 5.93 (lHd, =CH), 5.54 (1Hdd, CH), 5.20 (1 Hdt, CH), 5.10 (1 Hdt, CH), 4.78 (2Hm, 2xCH), 4.44 (l H brq, CH), 4.28 (1 Hdd, CH), 3.82 (3Hs CH3), 1.91 (3Hs, CH3), and 1.48 (18Hs, 2x tert butyl).
LCMS R, = 3.87min. (MH+ = 738, MHf = 736) Example 3 OH OyO & NO2 H O COZDPM
4-NO2 PhOCOCI 0 o o H O C02DPM
II
0 HN HN NHBOC pyridine/DMAP 10 Oo 0 u u HN
II
NBOC
C36H44N4012 = 724 C43H47N5016 = 889 H2N__~O-'-I-O---_-O-__-I-_\NH2 O)LN~~\O~/O~\O~\N)LO
H
OH C02DPM H O ( COZDPM
OYO OYO
HN HN
O 0 HNyNHBOC 0 O J HNYNHBOC
NBOC J~ NBOC
C84H103N10 29 = 1720 The benzhydryl (2R,3R,4S)-3-(acetylamino)-4-Q [(tert-butoxycarbonyl)amino]
[(tert-butoxycarbonyl)imino]methyl } amino)-2- { (S)-hydroxy[(4R)-2-oxo-1,3-dioxolan-yl]methyl}-3,4-dihydro-2H-pyran-6-carboxylate (0.4g;0.55mmole) was azeotroped times from dry toluene and the dried solid was dissolved in molecular sieve-dried pyridine (1.6m1). The solution was treated with 4-dimethylaminopyridine (0.17g;1.4mmoles). To this was added 4-nitrophenylchloroformate (0.12g;0.6mmole) under nitrogen. A slight exotherm occurred, the temperature rising from 24 C
to 27 C.
The mixture was stirred at room temperature for 3 hours after which time LC/MS
showed the absence of starting material and the presence of the nitrophenylcarbonate (Example 1) MH+ = 890.
To this mixture was added 4,7, 1 0-trioxa- 1, 13-tridecanediamine (60.7mg;
0.276mmole) in dry pyridine (1 ml). The resulting mixture was stirred at room temperature for 3 hours after which time LCMS showed the absence of the nitro compound 2 and the presence of product 3 at (M + 2H+)/2 = 861. Volatiles were removed in vacuo at 40 C and the resulting orange oil was applied to a lOg Si SPE cartridge eluted with DCM(5x), ether(5x) and EtOAc(5x). The product eluted in the EtOAc fractions as a white solid (0.2g; 22%).
The product may be deprotected using standard techniques.
N.B. The 4-nitrophenylchloroformate should be white with no trace of yellow colour.
LC/MS Details - Blue Method Micromass Platform II mass spectrometer operating in positive ion electrospray mode, mass range 100-1000 amu.
Column : 3.3cm x 4.6mm ID, 3 m ABZ+PLUS
Flow Rate : 3m1/min Injection Volume : 5p.1 Solvent A : 95% acetonitrile + 0.05% formic acid Solvent B : 0.1 % formic acid + 1OmMolar ammonium acetate Gradient : 0% A/0.7min, 0-100% A/3.5min, 100% A/l.lmin, 100-0% A/0.2min LC/MS Details - Orange Method Instrument: Micromass Platform II
Ionisation Mode: Electrospray +ve Range: 100-1000amu Column: 50mm x 2.1mm Phenomenex Luna C18, 5um.
Flow:1.0ml/min Inj Vol: 5u1 Diode Array Detector: 220-300nm Mobile Phase: A - Water + 0.05% v/v TFA.
B - Acetonitrile + 0.05% v/v TFA
Gradient: Time %A %B
8.1 100 0 It is to be understood that the present invention covers all combinations of particular and preferred subgroups described hereinabove.
Throughout the specification and the claims which follow, unless the context requires otherwise, the word `comprise', and variations such as `comprises' and `comprising', will be understood to imply the inclusion of a stated integer or step or group of integers but not to the exclusion of any other integer or step or group of integers or steps.
The application of which this description and claims forms part may be used as a basis for priority in respect of any subsequent application. The claims of such subsequent application may be directed to any feature or combination of features described herein.
They may take the form of composition, process, or use claims and may include by way of example and without limitation the following claims.
Claims (13)
1. A compound of formula (I):
wherein R represents a carboxylic acid protecting group;
P1 and P2 can be the same or different and are selected from amine protecting groups;
P3 represents a protecting group for 1,2 diols; and LG represents a leaving group.
wherein R represents a carboxylic acid protecting group;
P1 and P2 can be the same or different and are selected from amine protecting groups;
P3 represents a protecting group for 1,2 diols; and LG represents a leaving group.
2. A compound according to claim 1, wherein R is C1-6 alkyl, C3-6 cyclic alkyl or diphenylmethane.
3. A compound according to claim 1 or claim 2, wherein Pi and/or P2 is/are a t-butoxy carbonyl (Boc) group.
4. A compound according to any one of claims 1 to 3, wherein P3 is CO or CHMe.
5. A compound according to any one of claims 1 to 4, wherein LG is para-nitrophenol, halide, imidazole or N-hydroxysuccinimide.
6. A compound according to any one of claims 1 to 5, wherein R is methyl or diphenylmethane, P1 and P2 are Boc, P3 is CO and LG is para-nitrophenol.
7. A process for the preparation of a compound of formula (I) as defined in any one of claims 1 to 6, which comprises reacting a compound of formula (III):
wherein P1, P2, P3 and R are as defined in any one of claims 1 to 6, with a compound of formula (II):
wherein each LG is as defined in any one of claims 1 to 6, in a solvent, and a base.
wherein P1, P2, P3 and R are as defined in any one of claims 1 to 6, with a compound of formula (II):
wherein each LG is as defined in any one of claims 1 to 6, in a solvent, and a base.
8. A process as claimed in claim 7, wherein the reaction is carried out in the absence of water.
9. A process according to claim 7 or claim 8, wherein the solvent is pyridine.
10. A process according to any one of claims 7 to 9, wherein the base is a tertiary amine.
11. A process according to claim 10, wherein the tertiary amine is dimethylaminopyridine (DMAP), 4-pyrrolidinopyridine or 1,8-diazabicyclo[5.4.0]undec-7-ene.
12. Use of a compound of formula (I) as defined in any one of claims 1 to 6, in the preparation of a neuraminidase inhibitor conjugate of formula (V):
13. A process for the preparation of a compound of formula (V) as defined in claim 12, which comprises reacting the compound of formula (I) as defined in any one of claims 1 to 6, wherein in the compound of formula (I), R is methyl and P3 is C=O, with a compound of formula (VI):
in a solvent and in the presence of base followed by deprotection.
in a solvent and in the presence of base followed by deprotection.
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AUPR757401 | 2001-09-07 | ||
AUPR7574 | 2001-09-07 | ||
PCT/AU2002/001187 WO2003022841A1 (en) | 2001-09-07 | 2002-08-30 | Intermediates for preparing neuraminidase inhibitor conjugates |
Publications (2)
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CA2456239A1 CA2456239A1 (en) | 2003-03-20 |
CA2456239C true CA2456239C (en) | 2010-11-30 |
Family
ID=3831510
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CA2456239A Expired - Fee Related CA2456239C (en) | 2001-09-07 | 2002-08-30 | Intermediates for preparing neuraminidase inhibitor conjugates |
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US (1) | US7230114B2 (en) |
EP (1) | EP1423385B1 (en) |
JP (1) | JP4463553B2 (en) |
AT (1) | ATE399779T1 (en) |
BR (1) | BR0212261A (en) |
CA (1) | CA2456239C (en) |
DE (1) | DE60227386D1 (en) |
DK (1) | DK1423385T3 (en) |
ES (1) | ES2307776T3 (en) |
MX (1) | MXPA04002141A (en) |
PT (1) | PT1423385E (en) |
WO (1) | WO2003022841A1 (en) |
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CN113461631B (en) * | 2021-06-29 | 2022-10-14 | 上海应用技术大学 | 1,3, 4-oxadiazole neuraminidase inhibitor and preparation method and application thereof |
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RU2169145C2 (en) * | 1996-08-13 | 2001-06-20 | Санкио Компани, Лимитед | Derivatives of neuraminic acid, pharmaceutical composition and method of treatment and prophylaxis of influenza |
AUPR001000A0 (en) * | 2000-09-08 | 2000-10-05 | Biota Scientific Management Pty Ltd | Novel chemical compounds and their use |
-
2002
- 2002-08-30 EP EP02759906A patent/EP1423385B1/en not_active Expired - Lifetime
- 2002-08-30 WO PCT/AU2002/001187 patent/WO2003022841A1/en active IP Right Grant
- 2002-08-30 DK DK02759906T patent/DK1423385T3/en active
- 2002-08-30 US US10/488,791 patent/US7230114B2/en not_active Expired - Fee Related
- 2002-08-30 JP JP2003526916A patent/JP4463553B2/en not_active Expired - Fee Related
- 2002-08-30 MX MXPA04002141A patent/MXPA04002141A/en active IP Right Grant
- 2002-08-30 BR BR0212261-8A patent/BR0212261A/en not_active IP Right Cessation
- 2002-08-30 ES ES02759906T patent/ES2307776T3/en not_active Expired - Lifetime
- 2002-08-30 CA CA2456239A patent/CA2456239C/en not_active Expired - Fee Related
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EP1423385A1 (en) | 2004-06-02 |
EP1423385B1 (en) | 2008-07-02 |
US7230114B2 (en) | 2007-06-12 |
EP1423385A4 (en) | 2004-12-01 |
US20050032853A1 (en) | 2005-02-10 |
JP4463553B2 (en) | 2010-05-19 |
DK1423385T3 (en) | 2008-11-03 |
WO2003022841A1 (en) | 2003-03-20 |
PT1423385E (en) | 2008-09-24 |
CA2456239A1 (en) | 2003-03-20 |
ATE399779T1 (en) | 2008-07-15 |
DE60227386D1 (en) | 2008-08-14 |
ES2307776T3 (en) | 2008-12-01 |
JP2005501921A (en) | 2005-01-20 |
BR0212261A (en) | 2004-10-19 |
MXPA04002141A (en) | 2004-07-23 |
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